Kustusch, K.; Cząstkiewicz, D.; Wuczyński, A. Assessing Abundance and Habitat Preferences of Goldcrest Regulus Regulus and Firecrest Regulus Ignicapilla Using Passive Acoustic Monitoring and Point-Count Surveys in Temperate Forest Ecosystem in Poland. Ornis Fenn 2026, 00-00. https://doi.org/10.51812/of.154841.